4bone.mynet.it has no MX records.
Question and response
Question
dig 4bone.mynet.it. MX
Answer
The response has no answer records.
Authority
4bone.mynet.it. 3600 SOA rdns1.mynet.it. hostmaster.mynet.it. 0 60 60 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0